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7968980 = 2251967313
BaseRepresentation
bin11110011001100011010100
3112222212101102
4132121203110
54020001410
6442445232
7124510115
oct36314324
915885342
107968980
114553238
122803818
131860296
1410b620c
15a762a5
hex7998d4

7968980 has 48 divisors (see below), whose sum is σ = 17935680. Its totient is φ = 2965248.

The previous prime is 7968959. The next prime is 7969019. The reversal of 7968980 is 898697.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25304 + ... + 25616.

It is an arithmetic number, because the mean of its divisors is an integer number (373660).

Almost surely, 27968980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7968980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8967840).

7968980 is an abundant number, since it is smaller than the sum of its proper divisors (9966700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7968980 is a wasteful number, since it uses less digits than its factorization.

7968980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 7968980 is about 2822.9381856498. The cubic root of 7968980 is about 199.7411651672.

The spelling of 7968980 in words is "seven million, nine hundred sixty-eight thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 19 20 38 67 76 95 134 190 268 313 335 380 626 670 1252 1273 1340 1565 2546 3130 5092 5947 6260 6365 11894 12730 20971 23788 25460 29735 41942 59470 83884 104855 118940 209710 398449 419420 796898 1593796 1992245 3984490 7968980